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Letters Yctcnt No. 108,041, dnterl (lcizobcr s, 1870.

The Eoheduio reforrcii to in Lottcm Patent and mskmg pan. oi tho name.

Li, Amour; Gov llcionvmr, oi the city o. New .r'orir, Ernie of New York, have invented a, certain proocss oi' which the following is at specification.

The; ioiiowing c. ilcscriptioo of r. new and improvco process, viz

lElcctro-Photo I'Qcmoskcning and Enznncling.

This process ho. ihr its object the reproriuction \w rrks ofnrt, or oi'noturo, hyincans of light, electricity, onri the acids.

The (lifiicnlty to this day in photographing on nictals has been to make them perfectly smooth ilil.

2 "on, so as to coincirlc with rho negatives anri cosh iivec on glass. 1' n The price of stool is too high, and. often the sicel is not pure. It is difficult to oven anal polish. ll]. The same is too cnsc with copnor plates, and more so with silver nod golti clot-cs.

The pcrfe '2 mills for roliin prcscino, polishing, roctcls :mot nmlrc thcm ns smooth; oven as glass.

"io ohvhttc all tlzcsc inconvcnicncos, and to crrrvo at o. perfect and practicable .rcsnlt, the ohjcci c? this invention, which I Sllllll hcrc tlescrlhc.

First, i take a thick l rench glass, pcrfcctly and lmoly grnincmond i mnkc thoreon it print, ihroogh the oil-known means oi cicctrotypy. I obtain a.

still and and shcctof that kind of metal grninctl and pcrfcctlyovc'movhich will most certainly coincide with the negative or positive on glass. (1 can employ both.) I prefer the copper, because I can give it all porsiihio forms, such oops, vases, plates, too. The inst-2.1 on which i opororc is of tho thiclrncss oi" a.

shoot of paper.

Eiccoml, the moi plate for photogo,

Third, I excuse the jlliiili to the light, the new;

rive as well asthc positive, in thecommon' way. Whom the pztttorn or thogihotogroi ih which is to he produced begins to show in Gar-it brown, 1 take it away I can make use ns'well of tho color corners. to print on mctrils, and to make, by these men-sis, an sizes and dimensions.

Fourth, if, for instance, .i wont to nrcdnco a pho hograph of a. pattern in silver on copper, I would niche nsc oi o. pos tive by trainsparcncc. In the oppositc 0125", that is to say, a pattern in copner on silver, I would tnlrc the negative in nilvcr on copper.

Fifth, in retiring the copper from the light, 1 Wash 'itl cll, and put it in n weal: both of nitrate of mercury. As soon as the picture appears, and when it lspomplete, I take it our, wash it, and submit it tot-he action of an electric pile, in a both rich with silver, (common in ele ctrotypy.) The silver settles in tho place of tho mcrcnry, mill, at tho some 11w moot, li hovc a complete photograph in silver on cooper, as soon so I have dissolved. the varnish, which rlocs not resist with acetic acid. mixcil with Water.

ixth, supposing, now, 1 wish to obtain a. photcgroph in iron on silver, I iii-he, then, Flcopper pinto prepared in the former manner, anti ll moire thereon, by means of the pile, a. deposit of iron. I varnish it with the varnish alreznly described, bring it to the light, wash it, and. acillnlete it, in such 2. way thet'the iron dissolves itself in those parts \vhcrc the light does not influence it. I thcn dissolve the varnish, and. I get a. photograph in copper on iron, or in iron on copper. I then make a. (18- ';cosit. of silver, by means of the electric pile. The silver deposits ithelf on the copper, and not on the iron. I have then a. photograph in iron on silver or silver on iron, according as I use a positive or a negative.

What I say about the iron and the silver can evi Gently ho npplicd to all other metals which are susceptible to tho workings of electricity.

Seventh, to enamel, Ina-kc a photograph in copper on. gold by the process above described. I then otclrthc copper with the acid, and I get the photograph. in depth or relief, which can serve to print from, and which can he enameled through the known process. The plate being enameled, I put on it a. rlcpcsit of silver or gold oriron, and I get all tho cfi'ccts possible.

Eighth, it will be easily understood that what I have said concerning the copper plates may also be. applied to silver or gold. plaice.

The solidity of the galvanic deposits is insured,

for this reason, that tho metals on which I opcmtc arc graincrl.

The deposits obtained dull, but it is cosy to polish cithcr the whole or a. part through the means well known to the trade.

This observation applies when objects are taken from nature. v

- For engravings, I use polished metals.

I am aware of the English patent of Newton, N 0. Having thus described my invention, 1,835, of 1857,(being a communication from Charles I elaiin- Megre,) but, in that process, the plates used are The process of electro-photo damaskening and en- 'common plates, while I use grained metallic plates, ameling, substantially as described.

prduced hy eleetro-deposition upon grained glass,

thereby insuring the solidity 0f the galvanic deposit, Witnesses: anclfao sim'ilo of engravings, 800., \vhich eannot be B. WEVER, accomplished by the plates used by them:-- O. BINDER.

ARTHUR GUY MORVAN. 

